| 郭薇,刘峰,贾耀君.基于升降HFM组合的高分辨抗混响波形设计[J].声学技术,2023,42(6):839~846 |
| 基于升降HFM组合的高分辨抗混响波形设计 |
| Waveform design of high resolution and anti-reverberation capability based on positive and negative HFM combination |
| 投稿时间：2021-10-27 修订日期：2022-01-07 |
| DOI：10.16300/j.cnki.1000-3630.2023.06.019 |
| 中文关键词: 主动声呐 虚假亮点 N-HFM组合信号 距离-速度分辨力 |
| 英文关键词: active sonar false bright spot N-HFM combination signal range-velocity resolution |
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| 中文摘要: |
| 双曲调频（Hyperbolic Frequency Modulation, HFM）波形是传统主动声呐常用的信号波形，具有多普勒不变性。HFM信号虽然便于匹配，但无法进行准确的测速、测距。升降HFM组合的V型双曲调频（V-Hyperbolic Frequency Modulation, V-HFM）脉冲信号，可以解决HFM的距离-速度耦合模糊问题，但在多目标情况下会有虚假亮点干扰问题。受V-HFM组合方式启发，文章提出一种新的HFM组合方法：N型双曲调频（N-Hyperbolic Frequency Modulation,N-HFM）组合信号。该信号形式可以降低虚假亮点出现的概率。水池实验表明：在多目标情况下，N-HFM脉冲信号可以实现距离和速度二维检测的较高分辨力，以及较强的抑制虚假目标的能力。 |
| 英文摘要: |
| The hyperbolic frequency modulation（HFM） waveform, which has the inherent Doppler-invariant property,is a common signal used in traditional active sonar. The echo of HFM pulse signal can stay matched to the matched filter, but it cannot be used to measure velocity and range accurately. The V-HFM pulse signal with the combined positive and negative HFM waveforms can solve the coupling fuzzy problem in measuring range and velocity, but there is interference of false targets in the case of double and multiple targets. Inspired by the V-HFM combination mode, a new combination method of HFM named N-HFM is proposed in this paper, which can reduce the probability of false targets. Test results in pool show that the N-HFM pulse signal can achieve high range-velocity resolution and strong ability suppressing false targets. |
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